为进一步明确诊断，首选的实验室检査为（  ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25969' and id < 2178460 and id<>'2178460' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25969' and id > 2178460 and id<>'2178460' order by id asc limit 5